Title: Astrometry and Photometry of NEOs Discovered by Ground-based Surveys.

Abstract: Gray time is requested to recover and do astrometry and photometry of faint, recently-discovered Near-Earth Objects (NEOs) and other NEOs flagged for urgent recovery. Followup on longer orbital arcs improves understanding of the statistics of the orbits and absolute magnitudes of the population as well as the risk of impact from individual objects. Priority for our followup is given to ``large'' NEOs (absolute magnitudes <=22), objects listed on impact risk pages, targets of radar, and Potentially Hazardous Asteroids (PHAs). Telescopes dedicated to followup and able to reach dim objects have been essential to NASA's NEO Observation Program. However, despite all the dedicated observers and self-followup by surveys, some important NEOs have slipped away before sufficient observations were made during their discovery apparitions. Those tend to be the ones with the more closely approaching, short-lived apparitions, and therefore in the most dangerous orbits. It is better to follow objects longer during their discovery apparitions than to have to search tens of degrees for them when they return years later, hence our need to reach fainter magnitudes.